121064865 has 32 divisors (see below), whose sum is σ = 204585600. Its totient is φ = 60963840.

The previous prime is 121064863. The next prime is 121064887. The reversal of 121064865 is 568460121.

It is not a de Polignac number, because 121064865 - 2¹ = 121064863 is a prime.

It is a Curzon number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (121064863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119481 + ... + 120489.

It is an arithmetic number, because the mean of its divisors is an integer number (6393300).

Almost surely, 2^121064865 is an apocalyptic number.

121064865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121064865 is a deficient number, since it is larger than the sum of its proper divisors (83520735).

121064865 is a wasteful number, since it uses less digits than its factorization.

121064865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 121064865 is about 11002.9480140551. The cubic root of 121064865 is about 494.6971108951.

The spelling of 121064865 in words is "one hundred twenty-one million, sixty-four thousand, eight hundred sixty-five".